Injector



(Model.)

W. E. DODGE. INJEGTOR.

Nq; 530,476. Patented Dec. 4, 1894.

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UNITED STATES ATENT Triton.

WALTER E. DODGE, BOSTON, MASSACHUSETTS.

I N JE C T O R SPECIFICATION forming part of Letters Patent No. 530,476, dated Decembertl, 1894.

Application led October l1, 1.894. Serial 1\l`o`l 525,545. (Model.)

To all whom it may concern:

Be it known that I, WALTER E. DODGE, of Boston, in the county of Suffolk and State of Massachusetts, have invented certain `new and useful Improvements in Injectors, of which the following is a specitication.

rIhis invention relates to injectors such as are commonly employed on locomotives to feed the boiler, and is an improvement on the device of this kind shown and described in my ftrmer patent, No. 478,741, granted July l2, 1 2.

One object is to arrange for adjustment of the waste-valve to compensate for wear without the necessity of going inside the casing.

Another object of the invention is to provide an improved form of connection between the steam and waste-valves and the operating lever. t t

To the above ends the invention'consists in a number of novel constructions and combinations of parts which are recited in the appended claims.

The accompanying drawings which form part of this specification, illustrate an embodiment of the invention. 1

Figure l showsthe complete device in longitudinal section. Fig. 2 shows a section on line 2-2 of Fig. l. Fig. 3 shows a section on line 3-3 of Fig. 2. Fig. A showsaplan view of part of the connections between the operating lever and the waste-valve.

The general arrangement and operation of the injector are the same as ordinarily employed, and hence a brief enumeration of the well-known features will suffice without a detailed statement of their construction and functions. j

The letter, a, designates the casing having inlet-ports, a and 01,2, for steam and water respectively; b,the combining cone; c, the steam cone; d, the steam-valve; e, the water-valve; and, f, the waste or surplus water-valve.

In the form of injector shown in my prior .patent above referred to, the waste-valve is located at a point beyond the combining cone. Now, it is highly desirable that the injector be interchangeable with `other styles of injectors and it so happens that in the fittings of a Nathan injector, the waste-water pipe comes at a place farther out than the point of location of the waste-valve in this former conl jecting from the casing.

struction of mine. To allow for this in the present case, I locate the Waste-valve near the place `.of connection of the combining cone with the casing. This, it will be observed, brings the valvedirectly under the said cone, and therefore I provide the valve with a bifurcated or slotted sten1,f, which straddles the cone, as clearly shown in Fig. 2. There is a loose connection between the stem and valve which permits the stem to turn to alimited extent without the valve, so as to avoid the latter turning on its seat. This connection is elected by means of a pin,f2, entered through the shank of the valve and engaging slots in the stern. See Fig. 3.

There is a rod like portion,f3, to the valve stem which is pinned to the bifurcated por` tion,f, and is formed with a screW-thread,f4, engaginga correspondingly threaded gland, f5, so that by turning the stem the valve can be seated and unseated. The upper end of the stem-member, f3, is screw-threaded and receives an arm, g, with jam-nuts, g', above and below said arm, so that said arm can be moved to diierent positions around the stem and locked in any of them. The object of this construction is to compensate for wear of the valve, for changing the relation of the arm and the stem changes the relation of the valve and its seat.

The operating-lever, h, is pivoted to a radius-bar, It', which is in turn pivoted to the casing, and said lever is pivotally connected with a slide, h2, fitting on a guide-rod, h3, pro- Said slide is formed with a curved rack, h4, on its upper side and the lever carries a pawl, h5, for engagement with said rack, and is operated by a handle, h5. The stem, d', of the steam-valve is screwthreaded and passed through ears on the slide, h2, and is adj ustably locked by nuts, d2, between said ears. The stem, e,of the watervalve is screw-threaded and passed through a sleeve, c2, which is connected by alink, e3, with the lever, h. The stem engages the sleeve loosely and a check-nut, e4, on the stem beyond the sleeve `provides for adjustment of the valve. t

Near the upper end of the lever there is pivotally attached a sleeveor collant, which loosely embraces a roda", carrying abutmentnuten?, on opposite sides of the collar. This rod has a pivotal connection at, i3, with the arm, g.

Normally the water-valve, f, stands open, and the steam and water sup ply valves, d and e, are closed, as shown in Fig. 1. It will be seen that upon drawing back the lever, h, the valves, d and e, will be opened, and as the 1ever reaches the limit of its movement, the valve, f, will be closed.

What I claim as my invention is as follows:

l. In a boiler-feeding injector, the combination with the operatinglever and the wastevalve whose "stem is screw-threaded to engage a correspondingly formed gland so that its turning seats and unseats the valve; of an arm rotatively adjustable on said stern and adapted to be locked thereon at different adjustments, and a rod connected with said arm and extending through a collar on the operating lever and having abutments on opposite sides of said collar.

2. In a boiler-feeding injector, the combif nation of a suitably constructed casing` a guide-rod projecting therefrom, a slide on said guide-rod having a rack, an operating lever centrally pivoted on a movable support attached to the casing, and pivotally connected with the slide, a pawl on said lever for engagement with the rack, a steam-valve having a stem connected with the slide, and a water-valve having a stem connected with the lever on the side of its fulcrum opposite that Where the slide is connected, the arrangement being such that the valve-stems are moved in opposite directions and the valves open and close simultaneously.

lIn testimony whereof I have signed my name to this specification, in the presence of. two subscribing witnesses, this 8th day of October, A. D. 1894.

WALTER E. DODGE. Witnesses:

E. BATCHELDER, A. D. HARRISON. 

